Pipe-bending apparatus



Aug. 7, 192 1,679,954

G- C- WEBBER PIPE BENDING APPARATUS Filed June 22, 1926 ill Patented Aug. 7, 1928.

UNITED STATES GEORGE CLIFFORD WEBBER, OF LOS ANGELES, CALIFORNIA.

PIPE-BENDING APPARATUS.

Application filed June 22, 1926. Serial No. 117,703.

My invention is a pipe bending apparatus particularly adapted to bend more or less soit pipes such as electric conduits l-ln object of my invention is a pipe bending apparatus particularly adapted for elec tric conduits or other pliable pipes in which the pipes are bent by hand.

A feature of my invention is utilizing stationar i holders for the pipes, the free ends of the pipes being engaged by a. bending device such. as that known in the trade as a hickey and the bending being manually done by the hiekey bending the pipes against the resistance of the stationary holding device.

ilnother feature 01 my invention is torming the holding device so that it may. be clamped to a board or held by a rod and having in addition gage steps or the like on the plate to position the hickey, and bendi'ng marks marked on the plate to show the dillerent positions for bending.

Another object of my invention is in making the holding device in sections so that it may be built up for dill'erent sizes of pipes.

My invention will be more readily understood from the following description and drawings, in which:

Fig. 1 is a perspective view of my bending device suitable for two sizes of pipes, with a leverage rod connected thereto;

Fig. 2 is a vertical cross section on the line 22 of Fig. l, in the direction of the arrows;

- Fig. .3 is a longitudinal section through Fig. EZon the line 3 3;

t is a section similar to Fig. 3, showing the trimmer of bending the pipes;

Fig. 5 is a perspective view of a modified form of bending device which may be secured to a base plate;

Fig. 6 is a vertical section on the line 6-4) of Fig. 5;

Fig. 7 is a perspective view of another term of my device suitable for two sizes of t r Fig. 8 is a vertical cross section on the line 8-43 of Fi 7;

Fig. 9 is a perspective view of a form of my invention constructed to allow building up to different size pipes, this figure showing the construction ior two sizes of pipes;

Fig. 10 is a view similar to Fig. 9 with an additional section attached thereto suitablefor bending three sizes oi. pipes;

Fig. 11 is a vertical cross section on the line l1-11 of Fig. 10; and

Figs. 12 and 13 are views of two different types of bending implements or so-called hickeys.

In the construction of Fi 1 to 4 the pipe holder designated by the numeral 1 is constructed substantially as follows:

This is preferably made with a heavy base section 2 with a central core 3 and with longitudinally curved jaws l and 5 leaving side core sections 6 and? to fit two sizes of pipes. The base is preferably provided with longitudinal ridges 8 and 9 to retain the pipe in position and the mouth 10 of the pipe holder is belied as illustrated particit larly in Figs. 3 and l. The base is secured to the gage plate 11 by means of screws 12 or the like and a holding rod 13. shown as a pipe is fitted into the bore 3 and may be retaincd therein in proper adjustment by a pin 14 extendingthrough registering apertures in the casting of the holding structure and an aperture in the holding rod.

The gage plate 11 is provided with gage stops 15 which are preferably small angles attached thereto by any suitable means and have gage n'iarks 16 and 17 thereon to facilitate the operation in bending the pipes.

In the operation of bending pipes these are inserted from the sides through the open jaws into the cores 6 and 7 and the free end oi? the pipe is engaged by a bending device 18 such as known in the trade as a hickey, bending the pipe as illustrated in Fig. 4.

It is usual -for the workmen to mark the pipes before bending in order that the various bent sections will conform to definite measurements. For instance, presuming the measurement 19 is required, that is, from the bent end of the pipe to the main section as shown in Fig. l, the mark 20 on the pipe would be placed opposite the mark 17 on the gage plate and the pipe bent up on the desired curve. These curves may be made either of short or of long radius as desired, but are preferably bent to conform to the bell of the pipe.

When the measurementillustrated by the numeral 21 is to be made the workman will probably make a mark such as 22 on the pipe and position this opposite the mark 16. The hickey is then engaged against the proper stop gage 15 and the pipe bent upwardly giving substantially the exact measurement required. These markings may if desired beasce'rtained by experiment and may differ accordingto the pipe used andthe type of hickeys utilized in bending same.

In the construction'of'Figs. 5 andG the holder is not provided with a base section but has downwardly extending longitudinal ribs 23 which are clamped to the gage plate by screws 24 or the like. This gives a central channel 25 for the holding rod and side channels 26 and'27 for the bending of the pipes. A series of rivets 28 through the base plate hold the pipe from rolling out of the bending jaws or the like.

.In the modification of: Figs. 7 and 8 the holder is provided with two jaws 29 and 30 for difi'erentsize pipesand is clamped to the gagestop as above described. In this case the holding rod 31 is madeof two difi'erent sizes, one end 32 being for holding in" the smaller size jaws and'the large end 33 for positioning'the larger size jaws so that the iGSPGCtlVe large and small size pipes can be ent 8 In the construction of Fig. 9 the holder is provided with two sets'of jaws but in this case the end ofthe base is formed with an alining surface 34 and'theupper jaw with an alining surface 35 so "that the additional holder 36 maybeplaced thereagainst; this holder havingclampingjaws 37 so that if desired three sizes 'ofi-pipes may be handled in the jaw 37 and in the core-38 and also inthejaws 39, or'if desiredfthecenter core maiy be'utilized for a'holding or supporting r0.a-. is "Itiwill be noted in Fig. 9 that the holder is illustrated as being bolted or .the like to a board40and-it is optionalwhether it be so heldor beheld by a supporting rod such as 13 and if desired moreover, the gage plate 7 with the gage stopsv may be omitted, the

the. end. These pins extend 'woi'kmen'putting marks on the board or the T I like to-guide in bending the pipes.

Inthe construction of Figs. 9, 10 and 11 Iillustrate-a quick adjustment for the holding rod in whichaa bolt 41 is secured in the holding device and has arms 42 swiveled thereon, .these' arms preferably having a slotted 'connection 43 and'having pins 44 at down through apertures 45 in the block structure, forming theholding device and engage in apertures 1 I 46 in the supporting rod orpipe.

-It willbe seen from the above constructionsthat my invention may be considerably modified from asimple form of bender such "as shown in Figs. 7 and'S suitable for two sizes of pipes with the holding or supporting rod being'engaged in one of the bending aws,- to {that 'otFigs; 1 to 6 in which the holding rod is intended to'fit in the central core or'passagel; There isalso the further construction of Figs. 9, .10 and 11 in which the number of holding jaws may be increased pipes.

It will thus be seen that my invention may be considerably changed in general construction and in specific details and may be further altered to suit dillerent circumstances or requirements in the trade. Such changes however, would be within the spirit of my invention as set forth in the description, drawings and claims.

Having described my invention, what I claim is:

1. A pipe bending device comprising in combination, a pipe holder having a flat base to rest on a floor or the like, said holder having a longitudinal passage on one side and open at the side and with a belled mouth, means to secure the holder in position, and means to grip a pipe and bend same, the main body of the pipe being retained in the passage of the holder.

2. A bending device comprising in combination, a pipe holder having a Hat base adapted to rest on a floor or the like, said holder having a plurality of longitudinal passages of diii'erent sizes on opposite sides and open at the sides, each having a belled mouth, means to secure the holder in position, and means to grip a pipe and bend same, the main body of the pipe being retained in a passage of the holder.

3. A bending device as claimed in claim 2,

havin in addition a rod havin ends of different sizes to fit in either of the passages and thereby forming a means for steadying the holder while the pipe is being bent in another passage.

4. A bending device comprising in combination, a pipe holder having a flat base to rest on a floor or the like, a passage at the side, open at the side and having a belled mouth, and a core extending through the holder parallel to the passage, said core being adapted to receive a rod to steady the holder while a pipe is being bent in the passage.

5. A bending device comprising in combination, a pipe holder having a fiat base adapted to sit on a floor, said holder having passages on the opposite sides and open at the sides,'with belled mouths, said passages being of diiferent sizes, and a gage plate secured to the holder adjacent the base and extending parallel to the passages, said plate having a plurality of gage stops extending upwardly from the plate.

forming a closure for the side of one of the passages and having a longitudinal open sided passage therein.

8. A pipe bender comprising in combination a pipe holder formed in a plurality of longitudinal sections, each of said sections having a jaw passage at the side, and a central. core formed between the sections of the holder, the core being adapted to receive a pipe to be bent or a holding rod.

9. A pipe bender as clain'ied in claim 8, one of the holders being provided with a series oi? apertures and removable pins adapted for insertion therethrough, the pins being adapted to engage a supporting rod or the like.

10. A pipe bending apparatus comprising in combination a plurality of pipe holders having a longitudinally abutting surface, each of said holders having a jaw at one side forming a longitudinal passage for pipes, said passages having belled mouths, one of said holders having a jaw closed at the side by the other holder forming a lonwith a longitudinah gitudinal core with a belled, mouth, the said passages and core being adapted to receive. pipes to be bent.

11. A pipe bending apparatus as claimed in claimv l0, one of said holders being provided with a bolt, arins swiveled to said bolt having pins, the holders having apertures therethrougln and the pins fitting in said apertures and being adapted to engage holding rods or the like.

12. A pipe bending apparatus comprising in combination, a bending structure having longitudinal passages at the sides and open at the sides, with belled months, said bending structinre having a flat base adapted to rest on a. floor a gage plate secured to the holder adjacent the base and extending parallel to the passages, said plate having upturned angles forming gage stops, and in addition gage marks on the plate to indicate nieasureineiiits for bending pipes.

In testimony whereof I have sig name to this specification.

GEORGE CLIFFORD VVEBBER.

ned my 

